a. Some events in nature have a repeating pattern. The
weather changes some from day to day, but things such as temperature and rain
(or snow) tend to be high, low, or medium in the same months every year.

b. Water can be a liquid or a solid and can be made
to go back and forth from one form to the other. If water is turned into ice
and then the ice is allowed to melt, the amount of water is the same as it
was before freezing.

c. Water left in an open container disappears, but water
in a closed container does not disappear.

a. People use their senses to find out about their surroundings
and themselves. Different senses give different information. Sometimes a person
can get different information about the same thing by moving closer to it
or further away from it.

b. Some of the things people do, like playing soccer,
reading, and writing, must be deliberately learned. Practicing helps people
to improve. How well one learns sometimes depends on how one does it
and how often and how hard one tries to learn.

c. People can learn from each other by telling and listening,
showing and watching, and imitating what others do.

a. Eating a variety of healthful foods and getting enough
exercise and rest help people to stay healthy.

b. Some things people take into their bodies from the
environment can hurt them.

c. Some diseases are caused by germs, some are not.
Diseases caused by germs may be spread by people who have them. Washing one's
hands with soap and water reduces the number of germs that can get into the
body or that can be passed on to other people.

a. People have many different feelings--sadness, joy,
anger, fear, etc.--about events, themselves, and other people.

b. People react to personal problems in different ways.
Some ways are more likely to be helpful than others. Talking to someone (a
friend, relative, teacher, or counselor) may help people understand their
feelings and problems and what to do about them.

a. Most food comes from farms either directly as crops
or as the animals that eat the crops. To grow well, plants need enough warmth,
light, and water. Crops also must be protected from weeds and pests that can
harm them.

b. Part of a crop may be lost to pests or spoilage.

c. A crop that is fine when harvested may spoil before
it gets to consumers.

d. Machines improve what people get from crops by helping
in planting and harvesting, in keeping food fresh by packaging and cooling,
and in moving it long distances from where it is grown to where people live.

a. Some kinds of materials are better than others for
making any particular thing. Materials that are better in some ways (such
as stronger or cheaper) may be worse in other ways (heavier or harder to cut).

b. Several steps are usually involved in making things.

c. Tools are used to help make things, and some things
cannot be made at all without tools. Each kind of tool has a special purpose.

a. Some things are more likely to happen than others.
Some events can be predicted well and some cannot. Sometimes people aren't
sure what will happen because they don't know everything that might be having
an effect.

b. Often a person can find out about a group of things
by studying just a few of them.